Analog Devices Inc./Maxim Integrated MAX1976AETA130+

Overview

MAX1976AETA130+ from Maxim Integrated is a low-dropout linear regulator with preset 1.30V output, delivering guaranteed 300mA continuous current at ≤100mV dropout (at 300mA), ±0.5% output voltage accuracy, and active-low open-drain RESET with 70ms delay. It operates from 1.62V–3.6V input and targets power management in space-constrained portable systems such as handheld computers and cellular phones.

For engineers reviewing the MAX1976AETA130+ datasheet, MAX1976AETA130+ pinout, MAX1976AETA130+ application, or MAX1976AETA130+ equivalent, key selection criteria include its 1.30V fixed output, 70ms RESET assertion time, SOT23-6 package footprint, thermal shutdown at +165°C, and compatibility with 1µF/4.7µF ceramic bypass capacitors for stable operation across -40°C to +85°C.

Technical Context

The MAX1976AETA130+ integrates a p-channel MOSFET pass transistor (R_DS(ON) = 0.33Ω) enabling load-independent quiescent current (90µA typical) and low dropout performance. Its internal error amplifier compares feedback against a precision reference to regulate output, while a dedicated power-good comparator drives the open-drain RESET output based on V_OUT crossing an 82.5% threshold with 1.7% hysteresis.

Shutdown control is logic-level compatible (V_IL ≤ 0.6V, V_IH ≥ 1.4V), pulling supply current below 1µA when SHDN is low; during shutdown, OUT is actively discharged via a 1.5kΩ internal resistor and RESET is asserted. Thermal protection activates at +165°C with 15°C hysteresis, cycling the pass transistor under sustained overload.

Key Specifications

Pinout & Package

MAX1976AETA130+ uses the 6-pin thin SOT23-6 package (1.6mm × 2.9mm × 1.1mm), optimized for high-density PCB layouts and thermal performance via GND-connected leads and exposed pad (not present in SOT23).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MAX1976AETA130+, both alternatives lack 300mA support and the 70ms RESET timing; TPS7A0513PDBVR offers better PSRR but insufficient current, while MCP1700T-1302E/TT omits RESET entirely and suffers 6× higher dropout-making MAX1976AETA130+ the sole option meeting all three requirements: 1.30V/300mA/70ms RESET in SOT23-6.

Availability

MAX1976AETA130+ is available at Aetrix Electronics and suitable for notebook computers, cellular phones, digital audio players, and PCMCIA cards requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX1976AETA130+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and portable applications.

The MAX1976AETA130+ belongs to the MAX1963A/MAX1976A family of low-input-voltage LDOs with integrated RESET, engineered specifically for battery-powered equipment where minimal dropout, tight accuracy, and reliable power-on reset are critical.

FAQ

What is the exact output voltage of the MAX1976AETA130+?

The MAX1976AETA130+ delivers a factory-trimmed fixed output voltage of 1.30V. This value is confirmed by the "130" suffix in the part number and verified in the Selector Guide and Electrical Characteristics table, where output voltage accuracy is specified as ±0.5% at +25°C. The device requires no external feedback resistors, simplifying design and reducing bill-of-materials count.

Does the MAX1976AETA130+ include a power-on reset function, and what is its timing behavior?

Yes, the MAX1976AETA130+ features an active-low, open-drain RESET output that remains asserted for a minimum of 70ms after the output voltage reaches regulation. This timing is explicitly defined in the Electrical Characteristics table under "Reset Delay (t_RP)" for MAX1976A. RESET deasserts only after V_OUT stabilizes above 82.5% of 1.30V and holds for ≥70ms, ensuring reliable microprocessor initialization.

What package type and dimensions does the MAX1976AETA130+ use?

The MAX1976AETA130+ uses the 6-pin thin SOT23-6 package (outline 21-0114), measuring 1.6mm × 2.9mm × 1.1mm. This is confirmed in the Ordering Information table and Package Information section, which lists "6 Thin SOT23-6" for the "MAX1976AETZ" variant series-including ETA130+. The package is lead(Pb)-free and RoHS-compliant, denoted by the "+" suffix.

What is the maximum continuous output current and dropout voltage specification for the MAX1976AETA130+?

The MAX1976AETA130+ guarantees 300mA continuous output current with a dropout voltage of 100mV at that load, as stated in the General Description and Electrical Characteristics table. This performance is achievable across the full -40°C to +85°C operating temperature range when using recommended 1µF input and 4.7µF output ceramic capacitors, and assumes V_OUT ≥ 1.8V per Note 2.

How does the MAX1976AETA130+ handle thermal overload and shutdown conditions?

Under thermal overload, the MAX1976AETA130+ activates internal protection at +165°C junction temperature, turning off the pass transistor until the die cools by 15°C (hysteresis). During logic-controlled shutdown (SHDN = low), MAX1976AETA130+ disconnects OUT from IN, pulls OUT to GND via a 1.5kΩ resistor, asserts RESET, and reduces supply current to <1µA-enabling ultra-low-power system states without external circuitry.